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https://www.readbyqxmd.com/read/28323906/flt-1-gene-polymorphisms-and-protein-expression-profile-in-rheumatoid-arthritis
#1
Agnieszka Paradowska-Gorycka, Anna Sowinska, Andrzej Pawlik, Damian Malinowski, Barbara Stypinska, Ewa Haladyj, Katarzyna Romanowska-Prochnicka, Marzena Olesinska
OBJECTIVES: Inflammation and angiogenesis are a significant element of pathogenesis in rheumatoid arthritis (RA). The FLT-1- triggering factor for production of proinflammatory cytokines-might contributes to inflammation in patients with RA. Association of the FLT-1 polymorphisms with different "angiogenic diseases" suggests that it may be a novel genetic risk factor also for RA. The aim of the study was to identify FLT-1 genetic variants and their possible association with sFLT-1 levels, susceptibility to and severity of RA...
2017: PloS One
https://www.readbyqxmd.com/read/28299914/the-onset-site-of-rheumatoid-arthritis-the-joints-or-the-lung
#2
G Cafaro, A Alunno, V Valentini, M Comasia Leone, E Marcucci, E Bartoloni, R Gerli
The etiopathogenesis of rheumatoid arthritis (RA) is not yet fully elucidated and the site of inflammation onset is still a matter of debate. The presence of autoantibodies as well as clinical manifestations, such as interstitial lung disease, before the onset of arthritis seems to be in favour of the hypothesis that initial pathogenic events take place in tissues other than the joint. In this review article we summarize the most recent literature on extra-synovial autoimmunity triggers eventually leading to RA, with particular focus on the role of the lung...
December 31, 2016: Reumatismo
https://www.readbyqxmd.com/read/28287814/activation-and-deactivation-of-5-ht1-receptor-of-accumbens-shell-area-does-not-alter-acpa-induced-aversive-memory-deficit-in-male-rat
#3
Marzieh Keramati-Nojedehsadat, Shahrbanoo Oryan, Mohammad Reza Zarrindast, Vahab Babapour
BACKGROUND: Some studies have indicated a close relation between serotonergic and cannabinoidergic systems in several brain regions. Thus, the aim of current study is investigating the effect of 5-HT1 receptors of accumbens shell (Acb shell) on aversive memory deficit induced by ACPA (cannabinoid CB1 receptor agonist) using test-retest protocol of elevated plus-maze (EPM) in male Wistar rats. METHOD: Bilateral guide cannulae were implanted to allow microinjection of ACPA, CP94253 HCL (5-HT1 receptor agonist agonist) or GR127935 HCL (5-HT1 receptor antagonist)...
March 2017: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/28282368/elevated-expression-of-immunoreceptor-tyrosine-based-inhibitory-motif-tigit-on-t-lymphocytes-is-correlated-with-disease-activity-in-rheumatoid-arthritis
#4
Qing Luo, Zhen Deng, Chuxin Xu, Lulu Zeng, Jianqing Ye, Xue Li, Yang Guo, Zikun Huang, Junming Li
BACKGROUND It is well known that lymphocytes play an important role in rheumatoid arthritis (RA). T cell immunoreceptors with immunoglobulin (Ig) and immunoreceptor tyrosine-based inhibitory motif (TIGIT) have immunosuppressive co-stimulatory molecules that mediate inhibitory effects, but their roles in RA are poorly understood. MATERIAL AND METHODS Were recruited 76 patients with RA and 33 healthy controls (HC). Clinical manifestations, laboratory measurements, physical examination, and medical history of RA patients were recorded...
March 10, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28275265/beyond-citrullination-other-post-translational-protein-modifications-in-rheumatoid-arthritis
#5
REVIEW
Leendert A Trouw, Theo Rispens, Rene E M Toes
The presence of autoantibodies is one of the hallmarks of rheumatoid arthritis (RA). In the past few decades, rheumatoid factors (autoantibodies that recognize the Fc-tail of immunoglobulins) as well as anti-citrullinated protein antibodies (ACPAs) have been studied intensively. ACPAs recognize post-translationally modified proteins in which the amino acid arginine has been converted into a citrulline. More recently, other autoantibody systems recognizing post-translationally modified proteins have also gained attention, including autoantibodies recognizing fragmented immunoglobulin (anti-hinge antibodies), autoantibodies recognizing acetylated proteins and autoantibodies recognizing proteins that are modified by adducts formed under oxidative stress...
March 9, 2017: Nature Reviews. Rheumatology
https://www.readbyqxmd.com/read/28246933/titer-dependent-effect-of-anti-citrullinated-protein-antibodies-on-systemic-bone-mass-in-rheumatoid-arthritis-patients
#6
Giovanni Orsolini, Cristian Caimmi, Ombretta Viapiana, Luca Idolazzi, Elena Fracassi, Davide Gatti, Giovanni Adami, Maurizio Rossini
Bone loss in rheumatoid arthritis (RA) is a key feature both local and systemic. Anti-citrullinated protein antibodies (ACPA) have recently been found to directly induce differentiation and activation of osteoclasts and therefore contribute to periarticular bone loss. The aim of this study was to analyze the effect of ACPA on systemic bone mineral density (BMD) in patients with established RA. This is a cross-sectional study with a single-center RA population. BMD was measured with Dual X-ray absorptiometry at lumbar and femoral sites...
February 28, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28243799/anti-citrullinated-protein-antibodies-are-associated-with-decreased-bone-mineral-density-baseline-data-from-a-register-of-early-arthritis-patients
#7
Irene Llorente, Leticia Merino, Ana M Ortiz, Eugenio Escolano, Saturnino González-Ortega, Rosario García-Vicuña, Jesús A García-Vadillo, Santos Castañeda, Isidoro González-Álvaro
Since the previous studies showed that anti-citrullinated protein antibodies (ACPA) can induce osteoclasts differentiation and activation, even before arthritis onset, the aim of our study was to determine whether ACPA-positivity is associated with lower bone mineral density (BMD) at baseline visit of a register of early arthritis (EA) patients. The study population comprised 578 patients (80% females) from our EA clinic with a median disease duration, 5.1 months (p25-p75: 6-8); median age, 53.6 years (41.9-66...
February 27, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28217975/clinical-trials-aiming-to-prevent-rheumatoid-arthritis-cannot-detect-prevention-without-adequate-risk-stratification-the-prompt-trial-as-example
#8
Leonie E Burgers, Cornelia F Allaart, Tom Wj Huizinga, Annette Hm van der Helm-van Mil
Objective Prevention of Rheumatoid Arthritis (RA) was the aim of several trials in undifferentiated arthritis (UA), with overall negative results. As preparatory work has revealed that only ∼30% of UA-patients progress to RA, we hypothesized that inclusion of patients without imminent RA could lead to false-negative results. We aimed to evaluate this hypothesis by re-investigating the PROMPT-trial (one-year course of methotrexate (MTX) versus placebo in UA) after exclusion of patients without a high-risk on RA-development...
February 19, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28207496/recent-advances-in-the-pathogenesis-prediction-and-management-of-rheumatoid-arthritis-associated-interstitial-lung-disease
#9
Cheilonda Johnson
PURPOSE OF REVIEW: To provide an overview of recently published articles covering interstitial lung disease associated with rheumatoid arthritis (RA-ILD). RECENT FINDINGS: Over the past year, many studies replicated previous findings in more diverse and occasionally larger populations internationally. Specifically, the association among cigarette smoking, high rheumatoid factor titer, elevated anticitrullinated protein antibody (ACPA) levels, and RA-ILD was strengthened...
February 15, 2017: Current Opinion in Rheumatology
https://www.readbyqxmd.com/read/28205333/longitudinal-study-of-clinical-prognostic-factors-in-patients-with-early-rheumatoid-arthritis-the-predict-study
#10
Paul Bird, Dave Nicholls, Rina Barrett, Julien de Jager, Hedley Griffiths, Lynden Roberts, Kathleen Tymms, Philip McCloud, Geoffrey Littlejohn
AIM: To assess the association between baseline clinical prognostic factors and subsequent Disease Activity Score of 28 joints (DAS28) remission in early rheumatoid arthritis (RA). METHODS: Data were collected using point of care clinical software from participating rheumatology centres. Patients aged 18 years or over whose date of clinical onset of RA was within the previous 12-24 months, who had at least 6 months of follow-up data and a DAS28-ESR (erythrocyte sedimentation rate) score recorded between 12 and 24 months from first being seen for RA were included...
February 16, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28198158/only-rheumatoid-factor-positive-subset-of-anti-citrullinated-peptide-protein-antibody-negative-rheumatoid-arthritis-may-seroconvert-to-anti-citrullinated-peptide-protein-antibody-positive
#11
Ryosuke Hiwa, Koichiro Ohmura, Shuichiro Nakabo, Chikashi Terao, Kosaku Murakami, Ran Nakashima, Yoshitaka Imura, Naoichiro Yukawa, Hajime Yoshifuji, Motomu Hashimoto, Moritoshi Furu, Hiromu Ito, Takao Fujii, Tsuneyo Mimori
AIM: Anti-citrullinated peptide/protein antibody (ACPA) has been reported to occur in about 60% of patients with early rheumatoid arthritis (RA), and about 80% in patients with established RA. While ACPA seroconversion is possible, previous reports have shown that it rarely occurs. We retrospectively determined the proportion of patients who underwent ACPA seroconversion and described the clinical characteristics of these cases. METHODS: ACPA-negative RA patients who had undergone ACPA assessment more than once with an interval of 3 months or longer were investigated for ACPA seroconversion...
February 15, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28195275/bond-strengths-of-orthodontic-metal-brackets-to-tribochemically-silica-coated-zirconia-surfaces-using-different-10-methacryloyloxydecyl-dihydrogen-phosphate-containing-primers
#12
Na-Hyun Kim, Yoon-Ji Kim, Dong-Yul Lee
PURPOSE: To evaluate the effects of tribochemical silica coating and different 10-methacryloyloxydecyl dihydrogen phosphate (MDP)-containing primers on the shear bond strength (SBS) of orthodontic metal brackets to yttrium-stabilized tetragonal zirconia polycrystal (Y-TZP) surfaces. MATERIALS AND METHODS: One hundred ninety polished Y-TZP specimens were randomly assigned to 19 groups (n = 10): 30 specimens were used for surface analyses after polishing with 600-grit silicon carbide paper, airborneparticle abrasion with 50-μm alumina (A), or tribochemical silica coating (CoJet [C]); 160 specimens were used in SBS testing of orthodontic metal brackets to Y-TZP after alumina airborne-particle abrasion or tribochemical silica coating and application of either ESPE-Sil (S) (ASn, ASa, CSn, CSa), Alloy Primer (AP) (AAPn, AAPa, CAPn, CAPa), Clearfil Ceramic Primer (CP) (ACPn, ACPa, CCPn, CCPa), or Scotchbond Universal (U) (AUn, AUa, CUn, CUa) and either stored in water for 24 h (non-aged, n) or thermocycled 5000 times (aged, a)...
February 10, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28188029/peptidylarginine-deiminase-2-is-required-for-tumor-necrosis-factor-alpha-induced-citrullination-and-arthritis-but-not-neutrophil-extracellular-trap-formation
#13
Mandar Bawadekar, Daeun Shim, Chad J Johnson, Thomas F Warner, Ryan Rebernick, Dres Damgaard, Claus H Nielsen, Ger J M Pruijn, Jeniel E Nett, Miriam A Shelef
Citrullination, the post-translational conversion of arginines to citrullines, may contribute to rheumatoid arthritis development given the generation of anti-citrullinated protein antibodies (ACPAs). However, it is not known which peptidylarginine deiminase (PAD) catalyzes the citrullination seen in inflammation. PAD4 exacerbates inflammatory arthritis and is critical for neutrophil extracellular traps (NETs). NETs display citrullinated antigens targeted by ACPAs and thus may be a source of citrullinated protein...
February 7, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28183721/carbamylation-of-vimentin-is-inducible-by-smoking-and-represents-an-independent-autoantigen-in-rheumatoid-arthritis
#14
Caroline Ospelt, Holger Bang, Eugen Feist, Giovanni G Camici, Stephan Keller, Jacqueline Detert, Anette Krämer, Steffen Gay, Khetam Ghannam, Gerd R Burmester
OBJECTIVES: Smoking has been connected to citrullination of antigens and formation of anti-citrullinated peptide antibodies (ACPAs) in rheumatoid arthritis (RA). Since smoking can modify proteins by carbamylation (formation of homocitrulline), this study was conducted to investigate these effects on vimentin in animal models and RA. METHODS: The efficiency of enzymatic carbamylation of vimentin was characterised. B-cell response was investigated after immunisation of rabbits with different vimentin isoforms...
February 9, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28182665/padi4-and-the-hla-drb1-shared-epitope-in-juvenile-idiopathic-arthritis
#15
Kaori Hisa, Masakatsu D Yanagimachi, Takuya Naruto, Takako Miyamae, Masako Kikuchi, Rhoki Hara, Tomoyuki Imagawa, Shumpei Yokota, Masaaki Mori
OBJECTIVE: Both genetic and environmental factors are associated with susceptibility to juvenile idiopathic arthritis (JIA). Many studies have reported that both a 'shared epitope' (SE) encoded by several HLA-DRB1 alleles and the peptidyl arginine deiminase type 4 (PADI4) gene polymorphisms are associated with susceptibility to rheumatoid arthritis (RA). However, it is uncertain whether JIA and RA share the latter genetic risk factor. Therefore, here we investigated relationships between HLA-SE and PADI4 polymorphisms with clinical subtypes of JIA...
2017: PloS One
https://www.readbyqxmd.com/read/28167133/nmda-receptor-adjusted-co-administration-of-ecstasy-and-cannabinoid-receptor-1-agonist-in-the-amygdala-via-stimulation-of-bdnf-trk-b-creb-pathway-in-adult-male-rats
#16
Ghorbangol Ashabi, Mitra-Sadat Sadat-Shirazi, Solmaz Khalifeh, Laleh Elhampour, Mohammad-Reza Zarrindast
Consumption of cannabinoid receptor-1 (CB-1) agonist such as cannabis is widely taken in 3,4- methylenedioxymethamphetamine (MDMA) or ecstasy users; it has been hypothesized that co-consumption of CB-1 agonist might protect neurons against MDMA toxicity. N-methyl-d-aspartate (NMDA) receptors regulate neuronal plasticity and firing rate in the brain through Tyrosine-kinase B (Trk-B) activation. The molecular and electrophysiological association among NMDA and MDMA/Arachidonylcyclopropylamide (ACPA, a selective CB-1 receptor agonist) co-consumption was not well-known...
February 3, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28155923/diagnosis-prognosis-and-classification-of-early-arthritis-results-of-a-systematic-review-informing-the-2016-update-of-the-eular-recommendations-for-the-management-of-early-arthritis
#17
COMMENT
Charlotte Hua, Claire I Daien, Bernard Combe, Robert Landewe
OBJECTIVE: To update the evidence pertaining to the diagnosis, prognosis and classification of patients with early arthritis (EA), and to inform the 2016 European League Against Rheumatism (EULAR) recommendations for the management of patients with EA. METHODS: MEDLINE, EMBASE and Cochrane databases were searched up to October 2015. The first part of the systematic literature review (SLR) involved a search for studies investigating the recognition and referral of EA...
2017: RMD Open
https://www.readbyqxmd.com/read/28146392/acpa-s-74th-annual-meeting
#18
(no author information available yet)
No abstract text is available yet for this article.
March 2017: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/28141917/enhanced-bruton-s-tyrosine-kinase-activity-in-peripheral-blood-b-lymphocytes-of-autoimmune-disease-patients
#19
Odilia B J Corneth, Gwenny M P Verstappen, Sandra M J Paulissen, Marjolein J W de Bruijn, Jasper Rip, Melanie Lukkes, Jan Piet van Hamburg, Erik Lubberts, Hendrika Bootsma, Frans G M Kroese, Rudi W Hendriks
OBJECTIVE: Bruton's tyrosine kinase (BTK) transmits crucial survival signals from the B cell receptor (BCR) in B cells. Pharmacological BTK inhibition effectively diminishes disease symptoms in mouse models of autoimmunity and, conversely, transgenic BTK overexpression induces systemic autoimmunity in mice. We investigated BTK expression and activity in human B cells in the context of autoimmune disease. METHODS: Using intracellular flow cytometry, we quantified BTK expression and phosphorylation in peripheral blood B cell subsets in patients with rheumatoid arthritis (RA; n=30) and primary Sjogren's Syndrome (pSS; n=26) and matched healthy controls...
January 31, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28118534/disease-associated-anti-citrullinated-protein-memory-b-cells-in-rheumatoid-arthritis-persist-in-clinical-remission
#20
Adam J Pelzek, Caroline Grönwall, Pamela Rosenthal, Jeffrey D Greenberg, Mandy McGeachy, Larry Moreland, William F C Rigby, Gregg J Silverman
OBJECTIVE: In RA, autoreactive B cells are pathogenic drivers and sources of anti-citrullinated protein antibodies (ACPA) that serve as a diagnostic biomarker and predictor of worse long-term prognosis. Yet the immunobiologic significance of persistent ACPA production at a cellular level is poorly understood. METHODS: In a cross-sectional study of RA patients, we investigated for the presence of continued defects in immune homeostasis as a function of disease activity...
January 24, 2017: Arthritis & Rheumatology
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